EP0259278B1 - Device for operating and orientating a pair of automatic sewing machine needles - Google Patents

Device for operating and orientating a pair of automatic sewing machine needles Download PDF

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Publication number
EP0259278B1
EP0259278B1 EP87830311A EP87830311A EP0259278B1 EP 0259278 B1 EP0259278 B1 EP 0259278B1 EP 87830311 A EP87830311 A EP 87830311A EP 87830311 A EP87830311 A EP 87830311A EP 0259278 B1 EP0259278 B1 EP 0259278B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
tubular element
rods
protuberance
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87830311A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0259278A1 (en
Inventor
Mario Ciucani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87830311T priority Critical patent/ATE57962T1/de
Publication of EP0259278A1 publication Critical patent/EP0259278A1/en
Application granted granted Critical
Publication of EP0259278B1 publication Critical patent/EP0259278B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement

Definitions

  • the present invention concerns the automatic sewing machine sector, specifically those machines featuring two needles that are fitted beside one another and at the same height, made to move syn- cronously and in conjunction with one another in the vertical plane, to form a stitch with a single crochet.
  • any type of sewing may be carried out, even if featuring a sequence of different stitches.
  • the object of the invention is to propose a device which enables two automatic sewing machine needles located beside one another to be driven synchronously in the vertical plane, in addition enabling the aforesaid needles to change over positions without their orientation in relation to the common crochet undergoing any change.
  • a further object of the invention is to propose a device achieving the above with an easily produced and highly reliable technical solution, able to be operated by means that can be coupled to a computerised unit.
  • the said objects are obtained by means of a device for operating and orientating a pair of automatic sewing machine needles, in which each of the needles of this said pair are locked at one end to the same number of equal vertical rods, located beside one another and at the same height, characterised by the fact that it comprises: a tubular element that is able to move in the vertical plane, within which the aforementioned rods are located symetrically in relation to the axis of the said tubular element, projecting from it at both heads and supported by it in such a manner as to be able to turn, means, that are an integral part of the load-bearing structure of the said machine, being provided to guide the vertical movement of the said tubular element; means for driving the said tubular element with a vertical outwards and return movement; a sleeve, supported by the said structure such that it is able to move, to which the upper central portion of the tubular element is coupled, the said tubular element projecting beyond the sleeve and able to slide along its axis
  • 1 indicates a sleeve supported by the load-bearing structure 2 of an automatic (leather) sewing machine so that it is able to turn.
  • the sleeve features a pinion 3 on the outside of its upper portion, which engages with a rack 4 that is an integral part of the rod 5 of a pneumatic jack, not illustrated.
  • the upper central portion of a tubular element 6, able to move vertically, is coupled to the sleeve; the said coupling, effected using known means 7 (e.g.: a key), enables the element 6 to slide along its axis in relation to the sleeve.
  • known means 7 e.g.: a key
  • the vertical movement of the tubular element is effected using known means 8, acting upon a portion of the latter which always remains outside the sleeve.
  • Two equal vertical rods, 9a and 9b, are located beside one another inside the tubular element, positioned so that they are bilateral to the axis of the element, and thus with their relevant axes running along the same vertical plane as the axis of the said vertical element 6.
  • the said rods project from both heads of the element 6.
  • the lower ends of the said rods are fitted with corresponding needles 10a and 10b, by means of the same number of mountings 11 a and 11 b.
  • the upper ends of the rods 9a and 9b are connected to corresponding tranverse means 12a and 12b, which serve to orientate the rods and thus the needles, as will be explained below.
  • Mountings 11 a and 11b strike against the lower head of element 6, whilst the upper head of the latter acts as a stop against which strike means 12a and 12b, such that rods 9a and 9b are supported by the tubular element 6 in such a way as to be able to turn.
  • the said transverse means 12a and 12b are of sufficient size to be struck by the upper head of sleeve 1; this prevents the tubular element 6 from sliding out of the latter.
  • the said transverse means 12a and 12b have the same shape.
  • each comprise a plate 13 through which a hole 14 passes; the edge of the plate features a curved protuberance 15 corresponding to the latter, with the concave surface facing outwards, the shape of which is defined by a half circumference that is coaxial with hole 14.
  • the said protuberance 15 follows on to the surface of a recess 16, with the concave surface facing inwards, the shape of which is defined by a half circumference the radius of which is greater than the radius of the previous half circumference.
  • the holes 14 of the two plates 13 of the relevant means 12a and 12b receive the upper ends of rods 9a and 9b respectively; suitable locking means, not illustrated, hold the the rods to the relevant plates: plates 13 are consequently perpendicular to the relevant rods.
  • Each plate 13 has, as an integral part of the head adjacent to recess 16, a spigot 17, the head of which features two cylindrical crowns 18; it should be emphasised that the centres of curvature of crowns 18, and the centres of the curved surfaces of the said protuberance 15 and recess 16 lie in the midplane "a" of spigot 17.
  • the crowns 18 are placed between and in contact with two vertical guide surfaces 19a and 19b forming a vertical groove 19 produced as a unit 20 forming an integral part of the structure 2; the height of the said groove 19 exceeds the maximum travel of the stroke of tubular element 6, whilst its width is greater than the distance between the axes of rods 9a and 9b.
  • the two needles 9a and 9b work in conjunction with a single crochet (not illustrated insofar as of known type), located below surface 21.
  • a first working configuration of needles 10a and 1 Ob is indicated as K1, in which mountings 11 a and 11 b assume the positions shown by the continuous lines in Fig. 4.
  • the transverse means 12a and 12b for orientating the rods 9a and 9b (and thus the needles) are positioned as shown in Fig.
  • the second working configuration of the needles is obtained by making sleeve 1 turn anti-clockwise in direction Z1, by means of rack 4 driven by the pneumatic jack; this causes the tubular element 6 to rotate in the same direction, and the axes of rods 9a and 9b to turn through a half circumference in relation to the axis of element 6.
  • the crowns 18 enable the spigots 17 of the relevant means 12a and 12b to be angled in relation to the midplane "b" of the corresponding groove 19, whilst, at the same time, the said crowns "slide” towards the inside of the relevant grooves 19; since rods 9a and 9b are held by the plates 13 of the corresponding means 12a and 12b, and the tubular element 6, a relative turning movement is effected.
  • means 12a and 12b are positioned as shown in Fig. 3c; the axes of rods 9a and 9b once again lie in the two planes "a" which coincide once again, but their new positions (configuration K2) represent a change over from one to the other of their previous positions (configuration K1); it should be noted that the pairs of crowns 18 are at the maximum distance from one another.
  • the axes of rods 9a and 9b lie in planes "a”, coinciding with the said planes "b", in configuration K2 aswell; this, together with the fact that the said rods are locked as an integral part to means 12a and 12b, enables the rods and thus the relevant needles to maintain the same orientation as they had in the first configuration K1.
  • the needles 10a and 10b effect the stitch in conjunction with the said crochet in both configurations K1 and K2; this has been neither illustrated nor described, the process being well known.
  • the device enables two needles located beside one another to be driven synchronously, in addition enabling them to change over positions without their orientation being subjected to any variation, as is essential for them to be able to operate in conjunction with the crochet.
  • the device does not alter the orientation of the needles as determined by means 12a and 12b during the formation of the stitch.
  • the device is designed in such a way as to enable its operation in conjunction with a computerised unit; indeed the rack 4 is operated by a pneumatic jack (full on or off only) and the tubular element 6 is operated by a connecting rod system (means 8): it is obvious that these operating means can be interfaced to the computer without difficulty.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP87830311A 1986-09-01 1987-08-27 Device for operating and orientating a pair of automatic sewing machine needles Expired - Lifetime EP0259278B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87830311T ATE57962T1 (de) 1986-09-01 1987-08-27 Vorrichtung, um die arbeitsstellung zweier parallelen nadelbarren einer automatischen naehmaschine miteinander auszutauschen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT497986 1986-09-01
IT8604979U IT208716Z2 (it) 1986-09-01 1986-09-01 Dispositivo per l'azionamento e l' orientamento di una coppia di aghi di una macchina cucitrice automatica

Publications (2)

Publication Number Publication Date
EP0259278A1 EP0259278A1 (en) 1988-03-09
EP0259278B1 true EP0259278B1 (en) 1990-10-31

Family

ID=11116676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830311A Expired - Lifetime EP0259278B1 (en) 1986-09-01 1987-08-27 Device for operating and orientating a pair of automatic sewing machine needles

Country Status (8)

Country Link
US (1) US4846086A (ja)
EP (1) EP0259278B1 (ja)
JP (1) JPH0425114Y2 (ja)
CN (1) CN1007438B (ja)
AT (1) ATE57962T1 (ja)
AU (1) AU589032B2 (ja)
ES (1) ES2018576B3 (ja)
IT (1) IT208716Z2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1226434B (it) * 1987-11-17 1991-01-15 Pio Simoni Dispositivo per l'orientamento operativo degli aghi in una macchina da cucire automatica.
IT1213617B (it) * 1987-11-19 1989-12-29 Spalletti Emilio E Carpineti I Dispositivo meccanico da installare su macchine cucitrici per invertire ripetutamente la posizione pur lasciandone inalterato l'orientamento di una coppia di aghi affiancati
JPH0246887A (ja) * 1988-08-10 1990-02-16 Iida Shintaro 平針の周方向位置の制御機構を有する皮革または同様な被加工物の縫製用ミシンとこのミシンを用いて縫う方法
IT1285454B1 (it) * 1996-01-25 1998-06-08 Mario Ciucani Macchina perfezionata per la cucitura di articoli vari, in particolare articoli di pelle e similari
IT1392032B1 (it) * 2008-09-18 2012-02-09 C M C I Srl Macchina da cucire a due aghi.
JP5859248B2 (ja) * 2011-08-31 2016-02-10 Juki株式会社 二本針ミシン

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118403A (en) * 1964-01-21 chambers
DE290695C (ja) *
US19541A (en) * 1858-03-09 Mill fob
DE166287C (ja) *
US1466154A (en) * 1918-03-15 1923-08-28 R M Sharaf Machine Co Needle-jogging mechanism for sewing machines
US2322523A (en) * 1942-05-30 1943-06-22 Emil Prazak Cross-stitch sewing machine
US3266449A (en) * 1964-10-02 1966-08-16 Firm G M Pfaff Ag Connecting means for double needle sewing machines
US4373458A (en) * 1978-07-14 1983-02-15 Usm Corporation Method and machine for versatile stitching

Also Published As

Publication number Publication date
AU7746587A (en) 1988-03-03
ATE57962T1 (de) 1990-11-15
JPH0425114Y2 (ja) 1992-06-15
US4846086A (en) 1989-07-11
JPS6368981U (ja) 1988-05-09
CN1007438B (zh) 1990-04-04
EP0259278A1 (en) 1988-03-09
ES2018576B3 (es) 1991-04-16
IT208716Z2 (it) 1988-05-28
AU589032B2 (en) 1989-09-28
IT8604979V0 (it) 1986-09-01
CN87106156A (zh) 1988-05-04

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